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I had to go back and read Bit Hack#6 again to check, but it DOES do what it says - it turns off the *rightmost 1 bit* (that is, the last binary '1' when reading left to right), which is not necessarily the *rightmost bit* of the number.
Grammatically it isn't clear that 1 is not count but the property of the bit. I mean it could mean "turns off rightmost n bits", it is here clear that n is count, in case of 1 we can't be sure about that.
I understood it from the context but I see what 'John Doe' says.
"Grammatically it isn't clear that 1 is not count but the property of the bit."
God that's funny. Talk about grammatically unclear ...
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It would be nice if you left your e-mail address. Sometimes I want to send a private message, or just thank for the great comment. Having your e-mail really helps.
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